I use Media Monkey to manage my music collection and one of the features I really like being able to categorize a song within multiple genres. So for instance, I may categorize AC/DC - Back in Black as Classic Rock, Hard Rock, and Metal. Then when I want to listen to the Classic Rock genre, the song shows up there. But when I want to listen to the Metal genre, it shows up there also.
Currently, the genre for the song appears in Subsonic as:
Classic Rock;Hard Rock;Metal --- which Subsonic considers a unique genre.
It would be nice in the settings if you could select the option to "separate genres by delimiter". In my case, I would add ; as my genre delimiter and then my genres would show and play in Subsonic correctly. I see this as similar to Excel when you import a comma delimited file and select the delimiter.